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Machine translation
1. (WO1980001951) LINEAR DIFFERENTIAL SENSOR OF THE FOUCAULT CURRENT TYPE USED TO MEASURE SHORT DISPLACEMENTS OF A METAL PIECE
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1980/001951    International Application No.:    PCT/FR1980/000034
Publication Date: 18.09.1980 International Filing Date: 11.03.1980
IPC:
G01D 5/20 (2006.01), G01D 5/22 (2006.01), G01L 9/00 (2006.01), G01L 9/10 (2006.01)
Applicants:
Inventors:
Priority Data:
7906206 12.03.1979 FR
Title (EN) LINEAR DIFFERENTIAL SENSOR OF THE FOUCAULT CURRENT TYPE USED TO MEASURE SHORT DISPLACEMENTS OF A METAL PIECE
(FR) CAPTEUR DIFFERENTIEL LINEAIRE A COURANTS DE FOUCAULT SERVANT A MESURER LES PETITS DEPLACEMENTS D"UNE PIECE METALLIQUE
Abstract: front page image
(EN)Sensor comprising two coils (1, 2) arranged within two ferrites semi-pots (3, 4) facing two non-ferromagnetic metal pieces (5, 6) of which at least one is movable. A slot generator (9) supplies the two coils through resistance (7, 8) connected to a reference potential. Two circuits (10, 11) detect the peak values of the resulting signals at the common point between the coils and the charge resistance thereof. An operational amplifier (12) does the difference between these peak values. A diode (13) allows the discharge of the coils through the resistance (7, 8). Application to pressure differential sensors, and to devices for measuring displacements.
(FR)Capteur comprenant deux bobines (1, 2) disposees dans deux demi-pots en ferrite (3, 4) en regard de deux pieces metalliques non ferromagnetiques (5, 6) dont l"une au moins est mobile. Un generateur (9) de creneaux alimente les deux bobines au travers des resistances (7, 8) reliees a un potentiel de reference. Deux circuits (10, 11) detectent les valeurs de cretes des signaux resultants aux points communs entre les bobines et leur resistance de charge. Un amplificateur operationnel (12) fait la difference de ces valeurs de cretes. Une diode (13) permet la decharge des bobines a travers les resistances (7, 8). Application aux capteurs de pression differentielle, et aux dispositifs de mesure de deplacements.
Designated States:
Publication Language: French (FR)
Filing Language: French (FR)